Shaw Yi Chen, 35, who grew up in Hacienda Heights, has contributed $565,000 to America Shining, the independent expenditure committee that produced the ads, according to the latest filing with the Federal Election Commission.

No other contributor is listed in the FEC report dated Oct. 15.

Last week, in a story about the Super PAC, Jay Chen, a Democrat, said he did not know anything about the independent expenditure committee America Shining and “had no coordination” with the group. He said he learned about the group when he saw their Internet ad attacking Royce, a Republican from Fullerton.

The ad is an homage to 1950s-style black-and-white monster movies and uses scary music and ghoulish imagery to depict Royce as a monster who goes around terrorizing senior citizens by taking away their Medicare.

Royce and Chen are are fighting to represent the 39th Congressional district, that includes Hacienda Heights, Rowland Heights, Walnut and Diamond Bar.